Inverlocky in Scotland, Ashford Castle, Dromoland, and Hayfield Manor are all Virtuoso, so be sure to book thru a Virtuoso agent.

Not a castle, even though it's called Gregans Castle, it's a towerhouse from the 15th century, is in the Burren and has outstanding service and some of the best food anywhere. Cozy bar with a peat fire. It's been in the owner's family for years and years and he and his wife are very hands on. Definitely book a minimum of a junior suite; premier suite recommended.